Improvement in sawing-machines



UNITED STATES PATENT OFFICE.

VILLIAM ll. DOANE, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN SAWING-MACHINES.

To afZZ whom t may concern.-

Be it known that I, WILLIAM Il. DOANE, of Chicago, in the county of Cookand State of Illinois, have invented a new and Improved Sawing-Maohine5and I do hereby declare that the following is a full, clear, and exactdescription of the saine, reference being had to the annexed drawings,making a part of this specification, in which Figure l is a sideelevation of my invention. Fig. 2 is a transverse vertical section ofthe same, taken in the line :c Fig. l. Fig. 3 is a horizontal section ofthe same, taken in the line y y, Fig. l.

Similar letters of reference indicate corrcsponding parts in the severalfigures.

This invention has forits object the adapting of a certain arrangementof feed-rollers which was patented by Tilliam H. Doane and Charles MasonJuly 27, 1858, to a reciprocating saw, whereby the machine above alludedto may be adapted to certain kinds of work which could not be wellperformed by the circular saw used in the machine aforesaid.

To enable those skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A represents aframe, which may be constructed in any suitable way tosupport the workingparts of the machine. On the frame A, at one end,there is placed a bed-piece B, which has oblong slots a made in it, toallow the passage through it of vertical tubular shafts C, which areattached to slides D, placed on the bed-piece. Each slide D is providedwith an upright E, the upper parts of which are curved inward toward thecenter of the bed-piece, as shown clearly in Fig. 2.

Within each hollow shaft Cthere is placed a spindle F. Through the upperparts of these spindles there pass horizontal arms Z), and on the lowerend of each spindle there is fitted a toothed wheel Cr. There are fourslides D, two at each side of the bed-piece, the two at one side beingdirectly opposite and in line with the two at the other side.

The wheels G gear into wheels H H', which are below the bed-piece B. Thewheels l-I H gear into each other, and the wheel Il is on a verticalshaft I, on the lower part of which there is a bevel-toothed wheel J.The wheel l-I is placed loosely on a stationary shaft K, att-ached tothe under side of the bed-piece B.

On the upper part of each spindle F there is fitted 'a vertical rollerL, said rollers having recesses in their lower ends to receive thespindles. Each roller is also provided internally with two pendent rodsc c, between which the arms b of the spindle fit, thus forming aconnection between the spindles and the rollers, as will be fullyunderstood by referring to Fig. 2. The upper journals of the rollers Lhave their bearings `in the upper curved ends of the uprights E E.

On the shafts I K there are placed levers M N, two on each shaft. Theselevers are allowed to turn freely on the shafts, and each pair M M N Nare connected by segmentgears O. The hollow shafts C pass through theouter ends of the levers M N.

P P are springs, the ends of which bear against the ends of the levers MN.

From the above description -it will be seen that the rollers L areconnected and will move simultaneously in and out from each other, andconsequently thefstu that is placed be-` tween the rollers will be fedcentrally to the saw. This arrangement of rollers was patented bylVilliam H. Doane and Charles Mason, July 27, 1858, as previouslyalluded to.

To the frame A there are attached two uprights Q Q, one at each side ofthe frame. To each of these uprights Q guides d are attached, on which asaw-sash R is fitted. The sash is allowed to work freely up and down onits guides d d, and a sawS of the ordinary reciprocating` kind is placedin the sash R. The saw-sash is driven by pitnien T T, which areconnected at their upper ends to crankpulleys U U at the ends of adriving-shaft V at the top of the uprights Q Q, and the lower ends ofthe pitlnen are attached to the lower ends of the saw-sash. To the lowerpart of the saw-sash, at one side, there is attached an arm XV, theouter end of which is connected by a pivot e to a lever X. This lever isat tached by a fulcrum-pin f to the side of the framing, and the lowerend of the lever X has a pawl Y attached, which engages with a ratchet Zon the shaft A in the lower part of the framing. The shaftA hasabevel-wheel B on it, which about gears into the bevelwheel J on theshaft I.

rollers being operated from one and the saine Y driving-shaft.

I do not claim the arrangement of the feedrollers L separately, for theyhave been previously patented. Nor do I claim any of lche partsseparately; but

I do claim as new and desire to secure by Letters Patent- Thecombination of the reciprocating saw R S, arm W, lever X, paWl Y,gearing Z A B J I, feed-rollers F L, arms M N, Springs P, and gearing GH H', all constructed, arranged, and operating in the manner and for thepurposes herein shown and explained.

W. H. DOANE.

Y Witnesses:

C. LJENKS, C. D. WOLF. Y- -Y

